A search for gf vegan cinnamon rolls seems to only lead to the recipe you posted, which actually sounds better than some of the others based in corn or oat flour, something foreign to me. Although, sorghum gives a bit of a hearty flavor is it's in a large enough quantity, so in care you want one that isn't based in that, here it goes:http://gliving.com/a-classic-cinnamon-roll-gluten-free/

They came out reasonably good. Everyone loved them, and they were pretty tasty. They were fairly moist, but not as puffy and fluffy as regular, yeast-based gluten-full rolls. However, they were quite well received with both the gluten-free and non-gluten-free eaters, so I think they went over well!

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